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Pontiac Forum: Sweet new ride ..
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  #1  
Old October 11th, 2018, 04:05 AM
AmotoXracer AmotoXracer is offline
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Sweet new ride ..

Just bought a 2007 Grand Prix GXP with 37k miles. Its pretty sweet. These cars are getting hard to find with low miles.

So there's a whirring noise, like a small electric motor with the key on, engine running, hvac off. Its in the interior and sounds like a fan motor for a laptop computer or something. Maybe like an interior temp sensor or something. Anyone know what this is ?

If someone has ever adjusted front camber to zero, and can speak to whether or not you have to elongate the bolt holes in the struts, then id like to know that. These cars came with Bilstein struts, or at least this one did, so I'm hoping I can just align it.

Anyone ever change the GPS radio out for the normal Monsoon cd player ?
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Old October 11th, 2018, 04:07 AM
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Wth I cant figure out how to upload a picture .. .
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Old October 11th, 2018, 10:04 AM
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FAQ will show how to load pictures.
The interior HVAC circulating fan runs all the time when the engine is running.
why are you trying to set camber to zero? The spec. I found is -1.15 + or - .70
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Old October 11th, 2018, 04:46 PM
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Quote:
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FAQ will show how to load pictures.
The interior HVAC circulating fan runs all the time when the engine is running.
why are you trying to set camber to zero? The spec. I found is -1.15 + or - .70
Ok well I hear something for sure. Maybe there's a fuse I can pull, otherwise ill have to find it and unplug it. I don't suppose you have a wiring schematic do you ?

I want camber to zero for two reasons. One is it handles better with camber set at zero, and two is tires wear better. You can really feel the negative spec the way its set up now. Too much driver input is required.
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Old October 11th, 2018, 05:10 PM
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you can pull the fan motor fuse to check if that is the source of the noise but if so you need a new fan motor.
Actually cars set for the track use negative camber so when going in a turn the loaded/outboard tire has a a larger contact patch. You can look for top plates that permit adjustment out of factory specifications.
Driver input sounds more like too much caster.
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Old October 11th, 2018, 05:43 PM
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you can pull the fan motor fuse to check if that is the source of the noise but if so you need a new fan motor.
Actually cars set for the track use negative camber so when going in a turn the loaded/outboard tire has a a larger contact patch. You can look for top plates that permit adjustment out of factory specifications.
Driver input sounds more like too much caster.
I don't want a track set up. The honest reality is this car is never going to go through a turn hard enough to roll the tire over onto its shoulder. I'm going to be using it primarily for highway travel, which means straight line stability is what I'm looking for.

I'm going to get to the bottom of this spinning fan thing. Is it under the dash pad ?
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Old October 12th, 2018, 10:45 AM
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As I noted above those are the factory alignment specs for the Grand Prix so it may not go all the way to zero you will have to try.
This video gives you an idea of where the blower is
https://www.youtube.com/watch?v=G_KPwEI-Pes
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Old November 15th, 2018, 09:20 AM
AmotoXracer AmotoXracer is offline
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So I set the car up with proper street alignment specs. Zero camber and zero toe, front and rear. Polishing the knurl off the strut bolts was required.

Night and day difference driving the car. Its so much better you just want to roll your eyes at whomever came up with the manufacturer specs. You need one finger on the steering wheel at one hundred mph, instead of a two handed white knuckle death grip.
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Old November 15th, 2018, 06:03 PM
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thanks for the update and glad to hear you got the car handling the way you wanted it to. I'm curious as to what the toe in was before you set it to zero, would you have those numbers?
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Old November 15th, 2018, 08:16 PM
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Quote:
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thanks for the update and glad to hear you got the car handling the way you wanted it to. I'm curious as to what the toe in was before you set it to zero, would you have those numbers?
It was toed out by about a tenth of a degree, so not way out of whack.
Left side camber was negative 1.6 degrees and right side was negative 1.1.
So that's not good. In fact its totally absurd. I had a z06 Corvette that wasn't set up that aggressive. But, its fixed now, so im happy about that. Next on the list is to hardwire in a radar detector and power supply for an ipad running Waze …
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